Lipstick case

ABSTRACT

Proposed is a lipstick case comprising: a first case having a pillar shape and having a lipstick accommodated therein; a second case having a pillar shape and having the first case accommodated therein; and a third case having a pillar shape and having the second case accommodated therein. A first protrusion outwardly protruding from the first case moves while being accommodated in a coupling slit formed to be long on one side of the second case, and thus the first case can move inside the second case. The third case can be coupled to the first protrusion.

TECHNICAL FIELD

The present invention relates to a lipstick case, and more particularly, to a lipstick case that is provided with a plurality of cases coupled to one another to draw a lipstick therefrom, without any rotation.

BACKGROUND ART

A general lipstick case includes a cylindrical housing and a rotation member connected to the housing, and as the rotation member rotates in a direction of an azimuth angle, accordingly, a lipstick accommodated in the housing is drawn from the housing.

Such a rotation method requires a “motion conversion structure” for converting the rotary motion into a linear motion. Undesirably, the motion conversion structure occupies a large portion of the manufacturing cost of the lipstick case and provides the main cause in durability problems of the lipstick case.

-   (Patent Document 1) Korean Patent No. 10-1346644

DISCLOSURE Technical Problem

Accordingly, the present invention has been made in view of the above-mentioned problems occurring in the related art, and it is an object of the present invention to provide a lipstick case that is capable of drawing the lipstick therefrom, without any rotation.

The technical problems to be achieved through the present invention are not limited as mentioned above, and other technical problems not mentioned herein will be obviously understood by one of ordinary skill in the art through the following description.

Technical Solution

To accomplish the above-mentioned objects, according to the present invention, there is provided a lipstick case including: first case having a first body having a pillar shape to accommodate a lipstick therein, a first coupling portion formed on one side of the first body, and a second coupling portion formed spaced apart from the first coupling portion on the other side of the first body; a second case having a second body having a pillar shape to accommodate the first body therein, a coupling slit formed on one side of the second body to accommodate a portion of the first coupling portion therein, and second grooves formed on the inner peripheral surface of the second body in such a manner as to be coupled to the second coupling portion; and a third case having a third body having a pillar shape to accommodate the second case therein and a third hook formed on the inner end periphery of the third body, wherein the coupling slit is extended long in a longitudinal direction of the second body, and the first coupling portion includes: a bridge formed on one side of the first body; and a first protrusion located in the bridge, protruding outward from the first body, accommodated in the coupling slit in such a manner as to be movable in the longitudinal direction, and coupled to the third hook.

According to the present invention, desirably, the bridge provides elasticity to the first protrusion in inside and outside directions of the first body.

According to the present invention, desirably, the bridge includes: a first bridge extended from the first body in a longitudinal direction of the first body; a second bridge extended from the first body in the longitudinal direction of the first body in such a manner as to be spaced apart from the first bridge; and a third bridge connecting the first bridge to the second bridge, extended from the first bridge in a transverse direction of the first body in such a manner as to be connected to the second bridge, and coupled to the first protrusion.

According to the present invention, desirably, the coupling slit includes: a sliding slit extended long in the longitudinal direction of the second body; and a seating hole communicating with the end portion of the sliding slit and having the corresponding shape to the first protrusion, and the width of the coupling slit becomes reduced and then enlarged toward the seating hole from the sliding slit.

According to the present invention, desirably, the second case includes a locking portion formed between the sliding slit and the seating hole in such a manner as to protrude from the second body toward the interior of the coupling slit.

According to the present invention, desirably, the second grooves includes a plurality of dimples concavely formed toward the interior of the second body in the longitudinal direction of the second body, and the second coupling portion includes: an arm formed on the other side of the first body; and a second protrusion located on the arm, protruding outward from the first body and coupled or separated to or from one of the plurality of dimples while the first protrusion is moving in the coupling slit.

According to the present invention, desirably, the arm provides elasticity to the second protrusion in the inside and outside directions of the first body.

According to the present invention, desirably, the third hook includes: a first slant surface connected to one end periphery of the third body and having a first angle with respect to a longitudinal direction of the third body; and a second slant surface extended to the other end periphery of the third body and having a second angle with respect to the longitudinal direction of the third body.

According to the present invention, desirably, the first slant surface faces the outside of the third body, and the second slant surface faces the inside of the third body.

According to the present invention, desirably, the second angle is larger than the first angle.

According to the present invention, desirably, the third case includes a third groove extended from the second slant surface toward the other end periphery of the third body in such a manner as to be concave toward the interior of the third case.

According to the present invention, desirably, the third hook is convex toward the interior of the third case.

According to the present invention, desirably, the first body includes: a first pillar having a hollow portion open on both ends thereof; a partition plate located in the hollow portion of the first pillar, and the first pillar is divided into upper and lower portions with respect to the partition plate, the upper portion of the first pillar and the partition plate being adapted to accommodate the lipstick therein.

According to the present invention, desirably, the first coupling portion and the second coupling portion are located on the lower portion of the first pillar.

Advantageous Effects

According to the present invention, the lipstick case can draw the lipstick therefrom, without any rotation.

The effects of the invention are not limited as mentioned above, and it should be understood that the effects of the invention include all effects inferable from the detailed description and claims of the present invention.

DESCRIPTION OF DRAWINGS

FIG. 1 is a perspective view showing a lipstick case according to the present invention, wherein an upper periphery of a second case is insertedly coupled to a third case.

FIG. 2 is a sectional view showing an interior of the third case of the lipstick case according to the present invention.

FIG. 3 is a sectional view showing the end periphery of the third case of the lipstick case according to the present invention.

FIG. 4 is a perspective view showing a coupling relation between a first case and the second case of the lipstick case according to the present invention.

FIG. 5 is a sectional view showing an interior of the second case of the lipstick case according to the present invention.

FIG. 6 is a perspective view showing the first case of the lipstick case according to the present invention.

FIG. 7 is a rear view showing the first case of the lipstick case according to the present invention.

FIG. 8 is a perspective view showing a state where the lower periphery of the second case is insertedly coupled to the third case of the lipstick case according to the present invention.

FIG. 9 is a sectional view showing a coupling relation between a first protrusion and the third case of the lipstick case according to the present invention.

FIG. 10 is a sectional view showing a coupling relation between a second protrusion and the second case of the lipstick case according to the present invention.

MODE FOR INVENTION

Hereinafter, the present invention will be in detail explained with reference to the attached drawings. However, the present invention may be modified in various ways and may have several exemplary embodiments. Therefore, the present invention is not limited with the embodiments as will be explained herein. In order to clearly describe the present invention, through the accompanying drawings, parts having no relation with the explanation are not illustrated, and in the description, the same reference numerals will be used to describe the same components.

In the description, when it is said that one element is described as being “connected”(contacted or coupled) to the other element, one element may be directly connected or coupled to the other element, but it should be understood that another element may be present between the two elements. When it is said that one portion is described as “includes” any component, further, one element further may include other components unless no specific description is suggested.

Terms used in this application are used to only describe specific exemplary embodiments and are not intended to restrict the present invention. An expression referencing a singular value additionally refers to a corresponding expression of the plural number, unless explicitly limited otherwise by the context. In this application, terms, such as “comprise”, “include”, or ‘have”, are intended to designate those characteristics, numbers, steps, operations, elements, or parts which are described in the specification, or any combination of them that exist, and it should be understood that they do not preclude the possibility of the existence or possible addition of one or more additional characteristics, numbers, steps, operations, elements, or parts, or combinations thereof.

Referring to FIG. 1, a lipstick case 10 includes a first case 100 and a second case 200. The first case 100 can be called “inner case”, and the second case 200 “middle case”.

The second case 200 has a hollow portion. The hollow portion of the second case 200 is open on at least one end periphery thereof. The second case 200 has a pillar shape. The second case 200 is extended longitudinally. For example, the second case 200 is extended in a direction of an axis Z. Both ends of the second case 200 are located in the direction of the axis Z. The second case 200 has a shape corresponding to the first case 100. For example, the hollow portion of the second case 200 has a shape corresponding to the first case 100.

The first case 100 is inserted into the second case 200. A lipstick 50 is coupled to the first case 100. The lipstick 50 is a cosmetic product applied to a user's lips. The lipstick 50 is accommodated in the second case 200 if the first case 100 is inserted into the second case 200.

A portion of the first case 100 is exposed to the outside through a slit formed on the second case 200 in a state where the first case 100 is inserted into the second case 200. A portion of the lipstick 50 is exposed to the outside through the slit formed on the second case 200 in a state where the first case 100 is inserted into the second case 200. The slit formed on the second case 200 provides a moving path along which the first case 100 moves in the second case 200 in a state where the first case 100 is inserted into the second case 200.

The lipstick case 10 further includes a third case 300. The third case 300 is called “outer case”. The third case 300 is extended longitudinally. For example, the longitudinal direction of the third case 300 is parallel with the longitudinal direction of the second case 200. For example, the third case 300 is extended in the direction of the axis Z.

The third case 300 has a hollow portion. The hollow portion of the third case 300 is closed on top end periphery thereof. The hollow portion of the third case 300 is open on bottom end periphery thereof.

The third case 300 accommodates the second case 200 therein. The second case 200 is fittedly coupled to the third case 300. The second case 200 fitted to the third case 300 is separable from the third case 300. The hollow portion of the third case 300 has a shape corresponding to the second case 200.

FIG. 2 shows the third case 300 taken along the line A-A of FIG. 1. Referring to FIG. 2, the third case 300 includes a third body 310 and a stopper 320.

The third body 310 constitutes a frame of the third case 300. The stopper 320 is located on one end periphery of the third body 310. The stopper 320 closes the hollow portion of the third body 310. A given pattern may be formed on the other side periphery of the third body 310. The given pattern formed on the other side periphery of the third body 310 is formed on the inner periphery of the third body 310. The given pattern formed on the other side periphery of the third body 310 is a portion where the third case 300 is coupled to the first case 100 (See FIG. 1).

FIG. 3 shows the third body 310 taken along the line B1-B2 of FIG. 2. FIG. 3 will be described, together with FIGS. 1 and 2. Referring to FIG. 3, the third body 310 includes a third pillar 311. The third pillar 311 has a given thickness. The given thickness of the third pillar 311 is defined as a first thickness T1.

A button seating portion 313 is formed on the end portion of the third pillar 311. The button seating portion 313 is connected to the third pillar 311. The button seating portion 313 is extended from the third pillar 311.

The button seating portion 313 has a step from the third pillar 311. A given thickness of the button seating portion 313 is defined as a second thickness T2. The second thickness T2 is smaller than the third thickness T1.

A third hook 315 is extended from the button seating portion 313. The third hook 315 is located on the opposite side to the third pillar 311 with respect to the button seating portion 313. The third hook 315 has a step with the button seating portion 313. A given thickness of the third hook 315 is defined as a third thickness T3. The third thickness T3 is larger than the second thickness T2. The third hook 315 has a convex shape toward the interior of the third case 300.

The third hook 315 includes a first slant surface 3151. The first slant surface 3151 is located on the end periphery of the third pillar 311. The first slant surface 3151 has a first angle ANG1 with respect to the longitudinal direction of the third pillar 311. The first slant surface 3151 faces the outside of the third body 310.

The third hook 315 includes a flat portion 3153. The flat portion 3153 is extended from the first slant surface 3151. The flat portion 3153 is parallel with the longitudinal direction of the third pillar 311.

The third hook 315 includes a second slant surface 3155. The second slant surface 3155 is extended from the flat portion 3153 and is thus connected to the button seating portion 313. The second slant surface 3155 has a second angle ANG2 with respect to the longitudinal direction of the third pillar 311. The second angle ANG2 is larger than the first angle ANG1. The second slant surface 3155 is connected to the first slant surface 3151. The second slant surface 3155 faces the inside of the third body 310.

A third groove 317 is formed on the end periphery of the third pillar 311. The third groove 317 is formed by means of the third pillar 311, the button seating portion 313, and the third hook 315. The third groove 317 has a concave shape toward the hollow portion of the third pillar 310 (See FIG. 1).

The third groove 317 accommodates a portion of the first case 100 (See FIG. 1). For example, the third groove 317 is coupled (separable) to (from) a protrusion of the first case 100 (See FIG. 1).

FIG. 4 shows a coupling relation between the first case 100 and the second case 200 according to the present invention. Referring to FIG. 4, the lipstick 50 is coupled to the first case 100. The lipstick 50 is coupled to the first case 100 in the longitudinal direction of the first case 100.

The second case 200 includes a second body 210. The second body 210 is defined as a second pillar. The second body 210 is coupled or separated to or from the third case 300 (See FIG. 1). The second body 210 accommodates the first case 100 therein. The second body 210 has a hollow portion. The hollow portion of the second body 210 is open on both end peripheries thereof. The longitudinal direction of the second body 210 is parallel with the direction of the axis Z.

The second case 200 includes a coupling slit 220. The coupling slit 220 is formed on the second body 210. The coupling slit 220 is located on the front surface of the second body 210.

The coupling slit 220 communicates with the hollow portion of the second body 210 and the outside of the second body 210. A given pattern formed on the inner periphery of the second body 210 is observed through the coupling slit 220 from the outside. For the convenience of the description, however, the pattern observable through the coupling slit 220 is not shown.

The coupling slit 220 has a generally long shape. For example, the coupling slit 220 is extended long along the longitudinal direction of the second body 210. The coupling slit 220 includes a sliding slit 221 and a seating hole 223.

Further, a locking portion 225 is formed between the sliding slit 221 and the seating hole 223. The locking portion 225 protrudes from the second body 210 toward the interior of the coupling slit 220. The locking portion 225 is an undercut portion of the coupling slit 220.

The width of the coupling slit 220 becomes reduced toward the locking portion 225 from the sliding slit 221. The width of the coupling slit 220 becomes reduced toward the locking portion 225 from the seating hole 223. The width of the coupling slit 220 becomes reduced and then enlarged toward the seating hole 223 from the sliding slit 221. The width of the coupling slit 220 is smallest in the locking portion 225.

The sliding slit 221 is extended long in the longitudinal direction of the second body 210. The seating hole 223 communicates with the sliding slit 221. The seating hole 223 is formed on one end of the sliding slit 221. For example, the seating hole 223 is formed on the bottom end of the sliding slit 221.

The first case 100 has a first body 110. The first body 110 constitutes an outer shape of the first case 100. The outer peripheral surface of the first body 110 has a general pillar shape. For example, the outer peripheral surface of the first body 110 has a shape of a general cylinder. The outer peripheral surface of the first body 110 is shaped correspondingly to the shape of the inner peripheral surface of the second case 200.

The first body 110 has a pillar shape forming a hollow portion, and accordingly, the shape of the first body 110 can be analyzed through a cylindrical coordinate. A center axis of the first body 110 is located on the axis Z of the cylindrical coordinate.

A first coupling portion 120 is formed on the first body 110. The first coupling portion 120 is coupled to the coupling slit 220. The first coupling portion 120 moves along the coupling slit 220 of the second body 210 in the longitudinal direction of the coupling slit 220 in a state of being coupled to the coupling slit 220.

The first coupling portion 120 includes a bridge 130. The bridge 130 is formed on the first body 110. The bridge 130 is formed unitarily with the first body 110. Further, bridge slits 140 are formed on both sides of the bridge 130.

The bridge slits 140 include a first bridge slit 141 and a second bridge slit 143. The first bridge slit 141 and the second bridge slit 143 are formed correspondingly to the shape of the bridge 130.

The bridge 130 is located between the first bridge slit 141 and the second bridge slit 143. The bridge slits 140 provide elasticity to the bridge 130.

The bridge 130 has given elasticity. An elastic direction of the bridge 130 is equal to a radius direction of the first body 110. The radius direction of the first body 110 is parallel with a direction from the inside of the first body 110 to the outside thereof. That is, the radius direction of the first body 110 is vertical with respect to the center axis of the first body 110.

The bridge 130 includes a first bridge 131, a second bridge 133, and a third bridge 135. The first bridge 131 constitutes one end portion of the bridge 130. The first bridge 131 is connected to the first body 110. The first bridge 131 is extended from the first body 110. The first bridge 131 is extended from the first body 110 in the longitudinal direction of the first body 110.

The second bridge 133 constitutes the other end portion of the bridge 130. The second bridge 133 is connected to the first body 110. The second bridge 133 is extended from the first body 110. The second bridge 133 is extended from the first body 110 in the longitudinal direction of the first body 110.

The third bridge 135 connects the first bridge 131 to the second bridge 133. The third bridge 135 is located between the first bridge 131 and the second bridge 133. The third bridge 135 is separated from the first body 110. The third bridge 135 is extended from the first bridge 133 in the transverse direction of the first body 110 in such a manner as to be connected to the second bridge 133.

The first coupling portion 120 has a first protrusion 150. The first protrusion 150 protrudes outward from the bridge 130. For example, the first protrusion 150 is located on the third bridge 135. The first protrusion 150 is coupled to the coupling slit 220. The first protrusion 150 is fitted to the coupling slit 220 and is thus moved along the coupling slit 220.

A process of coupling the first protrusion 150 to the coupling slit 220 can be considered. Before the first protrusion 150 is coupled to the coupling slit 220, first, the first protrusion 150 is located inside the second body 210. If the first protrusion 150 is located inside the second body 210, the first protrusion 150 facingly comes into contact with the inner peripheral surface of the second body 210. In this case, the bridge 130 provides elasticity so that the first protrusion 150 is located inside the second body 210. The first protrusion 150 moves inside the second body 210 and is thus located in the coupling slit 220. If the first protrusion 150 is located in the coupling slit 220, the first protrusion 150 is fittedly coupled to the coupling slit 220 by means of the elasticity generated from the bridge 130.

The first protrusion 150 coupled to the coupling slit 220 moves along the coupling slit 220. For example, the first protrusion 150 moves in the longitudinal direction of the coupling slit 220. The width of the coupling slit 220 corresponds to the first protrusion 150. If the first protrusion 150 moves along the coupling slit 220, the first case 100 moves inside the second body 210. If the first case 100 moves inside the second body 210, the lipstick 50 is varied in position inside the second case 200.

The first protrusion 150 is located in the seating hole 223. A size of the seating hole 223 corresponds to the first protrusion 150. The first protrusion 150 located in the seating hole 223 moves to the sliding slit 221. In a process where the first protrusion 150 located in the seating hole 223 moves to the sliding slit 221, the first protrusion 150 interacts with the locking portion 225.

The locking portion 225 provides physical (mechanical) resistance to the first protrusion 150. In a process where the first protrusion 150 moves to the seating hole 223 from the sliding slit 221, the locking portion 225 provides mechanical (physical) resistance to the first protrusion 150. In the process where the first protrusion 150 moves to the sliding slit 221 from the seating hole 223, the locking portion 225 provides the mechanical resistance to the first protrusion 150.

So as to allow the first protrusion 150 to come in and go out of the seating hole 223 in the coupling slit 220, a given external force is needed. For example, if the given external force is applied to the first protrusion 150, the first protrusion 150 can come in and go out of the seating hole 223 in the coupling slit 220. A direction of the external force applied to the first protrusion 150 is parallel with the longitudinal direction of the coupling slit 220.

FIG. 5 shows the second case 200 taken along the line C-C of FIG. 4. A plurality of second grooves 230 are formed on the inner peripheral surface of the second body 210. The second grooves 230 are located on the rear peripheral surface of the second body 210. The second grooves 230 are located on the rear inner peripheral surface of the second body 210.

The second grooves 230 are concavely formed toward the hollow portion of the second body 210. The second grooves 230 are called “dimples”. For example, the second grooves 230 include a first dimple 231, a second dimple 232, a third dimple 233, a fourth dimple 234, a fifth dimple 235, and a sixth dimple 236. The first to sixth dimples 230 are arranged in the longitudinal direction of the second body 210. The first to sixth dimples 230 are arranged in the longitudinal direction of the coupling slit 220.

FIG. 6 shows a coupling relation between the lipstick 50 and the first case 100. The first body 110 includes a first pillar 111 and a partition plate 113. The first pillar 111 has a hollow portion. The hollow portion of the first pillar 111 is formed in the longitudinal direction of the first pillar 111. The hollow portion of the first pillar 111 is open on both ends of the first pillar 111.

The partition plate 113 is located inside the first pillar 111. The partition plate 113 is formed correspondingly to the inner peripheral shape of the first pillar 111. The partition plate 113 is indicated by a dotted line in FIG. 6. The partition plate 113 is formed unitarily with the first pillar 111. For example, the partition plate 113 and the first pillar 111 are made by means of injection molding.

The partition plate 113 divides the hollow portion of the first pillar 111 up and down. The hollow portion formed on the upper portion of the first pillar 111 is open on top of the first pillar 111. The hollow portion formed on the lower portion of the first pillar 111 is open on underside of the first pillar 111.

The partition plate 113 divides the first pillar 111 into upper and lower portions. That is, the first pillar 111 is divided into upper and lower portions. The upper portion of the first pillar 111 and the partition plate 113 accommodate the lipstick 50 therein. The lower periphery of the lipstick 50 is located in the hollow portion formed on the upper portion of the first pillar 111. The first coupling portion 120 and a second coupling portion 160 as will be discussed later are located on the lower portion of the first pillar 111.

The first case 100 includes the second coupling portion 160. The second coupling portion 160 is located on the opposite side to the first coupling portion 120. For example, if the first coupling portion 120 is located on the front outer peripheral surface of the first body 110, the second coupling portion 160 is located on the rear outer peripheral surface of the first body 110. The second coupling portion 160 corresponds to the second grooves 230 (See FIG. 5). The second coupling portion 160 is coupled to the second grooves 230 (See FIG. 5).

FIG. 7 shows the first case 100 of FIG. 6 when viewed on the rear side thereof. For the convenience of the description, FIG. 7 shows the rear surface of the first case 100 in a state where the front surface of the first case 100 is removed.

Referring to FIG. 7, the first case 100 includes the second coupling portion 160. The second coupling portion 160 includes a second protrusion 170 and an arm 180. The arm 180 may be called “second connector”.

The arm 180 is extended from the first body 110. The arm 180 has a longitudinal direction. For example, the longitudinal direction of the arm 180 is parallel with the longitudinal direction of the first body 110. For example, the longitudinal direction of the arm 180 is parallel with the axis Z. One end of the arm 180 is connected to the first body 110. The other end of the arm 180 is connected to the second protrusion 170.

The arm 180 is extended from the first body 110 in the longitudinal direction of the first body 110. Even though not shown, an extension direction of the arm 180 from the first body 110 may cross the longitudinal direction of the first body 110. The arm 180 has elasticity with respect to the first body 110. The elastic direction of the arm 180 is a radius direction of the first body 110. The arm 180 is formed unitarily with the first body 110.

The second protrusion 170 is connected to the arm 180. The second protrusion 170 is extended from the arm 180. The second protrusion 170 is formed unitarily with the arm 180. The second protrusion 170 protrudes from the arm 180. The second protrusion 170 is located on the end portion of the arm 180.

A connection slit 190 is formed on the first body 110. The connection slit 190 surrounds a portion of the arm 180. The connection slit 190 surrounds the second protrusion 170. The connection slit 190 communicates with the inside and outside of the first body 110. The shape of the connection slit 190 corresponds to the shape of the arm 180. The connection slit 190 has the shape accommodating the arm 180 and the second protrusion 170 therein.

The connection slit 190 includes a first connection slit 191 and a second connection slit 193. The arm 180 is located between the first connection slit 191 and the second connection slit 193. The first connection slit 191 communicates with the second connection slit 193.

Referring to FIG. 8, the second case 200 fitted to the first case 100 is coupled to the third case 300. The lower end periphery of the second case 200 is inserted into the third case 300. A coupling relation between the second case 200 and the third case 300 of FIG. 8 is different from the coupling relation between the second case 200 and the third case 300 of FIG. 1, in view of their coupling direction. That is, FIG. 1 shows the coupling relation in which the top end periphery of the second case 200 is inserted into the third case 300, and FIG. 8 shows the coupling relation in which the lower end periphery of the second case 200 is inserted into the third case 300.

FIG. 9 shows the front surface of the lipstick case 10 taken along the line E1-E2 of FIG. 8. FIG. 10 shows the rear surface of the lipstick case 10 taken along the line E1-E2 of FIG. 8.

FIG. 9 will be explained together with FIG. 3. Referring to FIG. 9, the first protrusion 150 of the first case 100 is coupled to the third groove 317 (See FIG. 3). An explanation of a process in which the first protrusion 150 is coupled to the third groove 317 (See FIG. 3) will be given below.

If the lower end periphery of the second case 200 is inserted into the third case 300, the first protrusion 150 is locked onto the first slant surface 3151 of the third hook 315. The first slant surface 3151 provides a force to the first protrusion 150 bidirectionally. For example, the first slant surface 3151 provides a force to the first protrusion 150 in a first direction and in a second direction. The first direction is toward the second dimple 232 (See FIG. 5) from the first dimple 231 (See FIG. 5). The second direction is toward the inside of the first body 110 from the outside of the first body 110. In the state where the first body 110 is inserted into the second body 210, that is, the second direction is toward the first body 110 from the second body 210. The second direction is parallel with the radius direction. The first direction is parallel with the axis Z.

The force of the first slant surface 3151 applied to the first protrusion 150 in the first direction is transferred to the locking portion 225 (See FIG. 4). The force of the first slant surface 3151 applied to the first protrusion 150 in the second direction is transferred to the bridge 130. A ratio of the force applied to the first protrusion 150 in the first direction to the force applied to the first protrusion 150 in the second direction is varied according to the first angle ANG1 (See FIG. 3) of the first slant surface 3151.

The locking portion 225 receives the force of the first slant surface 3151 applied to the first protrusion 150 in the first direction from the first protrusion 150. The bridge 130 receives the force of the first slant surface 3151 applied to the first protrusion 150 in the second direction from the first protrusion 150. If the first slant surface 3151 comes into contact with the first protrusion 150 to move the first protrusion 150 in the first direction, the resistance (or frictional force) of the locking portion 225 is larger than the elastic force of the bridge 130. Accordingly, if the first slant surface 3151 comes into contact with the first protrusion 150 to move the first protrusion 150 in the first direction, the first protrusion 150 can move in the second direction, while not escaping from the seating hole 223. If the first protrusion 150 moves in the second direction, the third hook 315 moves to the first direction (the direction of the axis Z) and thus engages with the first protrusion 150.

Now, the movement of the first protrusion 150 will be explained. The first slant surface 3151 guides the first protrusion 150 to the interior of the third case 300. If a given external force is applied to the third case 300 in a coupling direction of the third case 300 to the second case 200, the first protrusion 150 moves over the first slant surface 3151 of the third hook 315 (See FIG. 3) and is then seated onto the third groove 317 (See FIG. 3). In the process where the first protrusion 150 moves over the first slant surface 3151 of the third hook 315 (See FIG. 3) and is then seated onto the third groove 317 (See FIG. 3), the bridge 130 (See FIG. 4) provides elasticity to the first protrusion 150.

In a state where the first protrusion 150 is coupled to the third case 300, the third case 300 moves to top end periphery of the second case 200. If the third case 300 moves to top end periphery of the second case 200, the first protrusion 150 moves in the coupling slit 220 in the state of being coupled to the second case 300. For example, the first protrusion 150 moves to the sliding slit 221 from the seating hole 223 (See FIG. 4).

Referring to FIG. 10, if the first protrusion 150 (See FIG. 9) is located in the third groove 317 (See FIG. 3), the second protrusion 170 is coupled to the first dimple 231. The second grooves 230 provide a force of inhibiting the movement of the second protrusion 170 to the second protrusion 170.

If the third case 300 receives the force of moving to the top end periphery of the second case 200, the first protrusion 150 (See FIG. 9) receives the force from the third case 300. The first protrusion 150 (See FIG. 9) transfers the force to the second protrusion 170. The force transferred to the second protrusion 170 reaches the arm 180.

As the arm 180 has the given elasticity, if a given force is applied to the second protrusion 170, the second protrusion 170 moves to the inside of the first body 110, while coming into contact with the inner peripheral surface of the second body 210. The second protrusion 170 moving to the inside of the first body 110, while coming into contact with the inner peripheral surface of the second body 210, is coupled to the second dimple 232. If the third case 300 moves further toward the top end periphery of the second case 200, the second protrusion 170 is coupled to the sixth dimple 236 (See FIG. 5). The moving direction of the second protrusion 170 from the first dimple 231 to the second dimple 232 is a direction of drawing the lipstick 50 (See FIG. 1).

Referring to FIGS. 9 and 10, the process of separating the third case 300 coupled to the second case 200 from the second case 200 will be explained. For the convenience of the description, it is assumed that the second protrusion 170 is coupled to the second dimple 232 in FIG. 10.

In the state where the second protrusion 170 is coupled to the second dimple 232, the third case 300 receives an external force in a direction of being separated from the second case 200. The third hook 314 transfers the force to the first protrusion 150. The first protrusion 150 transfers the force to the second protrusion 170 and the bridge 130 (See FIG. 4).

While the state in which the first protrusion 150 does not escape from the third hook 315 (See FIG. 3) is kept, the second protrusion 170 is separated from the second dimple 232. The second protrusion 170 separated from the second dimple 232 moves toward the first dimple 231.

In the process where the second protrusion 170 moves from the second dimple 232 to the first dimple 231, the first protrusion 150 receives resistance from the locking portion 225. Through a force of the third slant surface 3155 applied to the first protrusion 150 in a third direction (in the opposite direction to the first direction), the first protrusion 150 is accommodated in the seating hole 223 (See FIG. 4) after passing through the locking portion 225. If the first protrusion 150 is located in the seating hole 223 (See FIG. 4), the second protrusion 170 is coupled to the first dimple 231.

If the third case 300 receives an external force of moving in the third direction with respect to the second case 200, the second slant surface 3155 transfers the force applied in the second direction to the first protrusion 150. If the first protrusion 150 moves in the second direction by means of the bridge 130 (See FIG. 4), the third hook 315 moves in the third direction. If the third hook 315 moves in the third direction, the third case 300 is separated from the second case 200.

In the state where the third case 300 is separated from the second case 200, a process in which the second case 200 is inserted into the third case 300 from the top end periphery thereof can be considered. The top end periphery of the second case 200 insertedly enters the third case 300. If the second case 200 is more inserted into the third case 300, the first protrusion 150 comes into contact with the first slant surface 3151. If the second case 200 is inserted more deeply into the third case 300, the first protrusion 150 moves in the second direction to allow the third case 300 to be coupled to the first protrusion 150. In this state, the lipstick case 10 can be kept in a given position by a user. This state is called “state kept” of the lipstick case 10 (See FIG. 1).

In the state where the lipstick case 10 (See FIG. 1) is kept, the process in which the third case 300 is separated from the second case 200 can be considered. The direction of separating the third case 300 from the second case 200 may be the first direction (the direction of the axis Z). If the third case 300 receives an external force applied in the first direction, the second slant surface 3155 comes into contact with the first protrusion 150. If the second slant surface 3155 comes into contact with the first protrusion 150 to apply a force to the first protrusion 150, the first protrusion 150 can move in the second direction (in the inside direction of the first body), while not escaping from the seating hole 223 (See FIG. 4). If the first protrusion 150 moves in the second direction, the third case 300 is separated from the first protrusion 150.

While the present invention has been described with reference to the particular illustrative embodiments, it is not to be restricted by the embodiments but only by the appended claims. It is to be appreciated that those skilled in the art can change or modify the embodiments without departing from the scope and spirit of the present invention. It should be therefore understood that the embodiments of the present invention are just exemplary embodiments, while not limiting the present invention. For example, the parts expressed in a singular form may be dispersedly provided, and in the same manner as above, the parts dispersed may be combined with each other.

The present invention may be modified in various ways and may have several exemplary embodiments. Specific exemplary embodiments of the present invention are illustrated in the drawings and described in detail in the detailed description. However, this does not limit the invention within specific embodiments and it should be understood that the invention covers all the modifications, equivalents, and replacements within the idea and technical scope of the invention. 

1. A lipstick case comprising: a first case having a first body having a pillar shape to accommodate a lipstick therein, a first coupling portion formed on one side of the first body, and a second coupling portion formed spaced apart from the first coupling portion on the other side of the first body; a second case having a second body having a pillar shape to accommodate the first body therein, a coupling slit formed on one side of the second body to accommodate a portion of the first coupling portion therein, and second grooves formed on the inner peripheral surface of the second body in such a manner as to be coupled to the second coupling portion; and a third case having a third body having a pillar shape to accommodate the second case therein and a third hook formed on the inner end periphery of the third body, wherein the coupling slit is extended long in a longitudinal direction of the second body, and the first coupling portion comprises: a bridge formed on one side of the first body; and a first protrusion located in the bridge, protruding outward from the first body, accommodated in the coupling slit in such a manner as to be movable in the longitudinal direction, and coupled to the third hook.
 2. The lipstick case according to claim 1, wherein the bridge provides elasticity to the first protrusion in inside and outside directions of the first body.
 3. The lipstick case according to claim 2, wherein the bridge comprises: a first bridge extended from the first body in a longitudinal direction of the first body; a second bridge extended from the first body in the longitudinal direction of the first body in such a manner as to be spaced apart from the first bridge; and a third bridge connecting the first bridge to the second bridge, extended from the first bridge in a transverse direction of the first body in such a manner as to be connected to the second bridge, and coupled to the first protrusion.
 4. The lipstick case according to claim 2, wherein the coupling slit comprises: a sliding slit extended long in the longitudinal direction of the second body; and a seating hole communicating with the end portion of the sliding slit and having the corresponding shape to the first protrusion, and the width of the coupling slit becomes reduced and then enlarged toward the seating hole from the sliding slit.
 5. The lipstick case according to claim 4, wherein the second case comprises a locking portion formed between the sliding slit and the seating hole in such a manner as to protrude from the second body toward the interior of the coupling slit.
 6. The lipstick case according to claim 2, wherein the second grooves comprise a plurality of dimples concavely formed toward the interior of the second body in the longitudinal direction of the second body, and the second coupling portion comprises: an arm formed on the other side of the first body; and a second protrusion located on the arm, protruding outward from the first body and coupled or separated to or from one of the plurality of dimples while the first protrusion is moving in the coupling slit.
 7. The lipstick case according to claim 6, wherein the arm provides elasticity to the second protrusion in the inside and outside directions of the first body.
 8. The lipstick case according to claim 2, wherein the third hook comprises: a first slant surface connected to one end periphery of the third body and having a first angle with respect to a longitudinal direction of the third body; and a second slant surface extended to the other end periphery of the third body and having a second angle with respect to the longitudinal direction of the third body.
 9. The lipstick case according to claim 8, wherein the first slant surface faces the outside of the third body, and the second slant surface faces the inside of the third body.
 10. The lipstick case according to claim 9, wherein the second angle is larger than the first angle.
 11. The lipstick case according to claim 8, wherein the third case comprises a third groove extended from the second slant surface toward the other end periphery of the third body in such a manner as to be concave toward the interior of the third case.
 12. The lipstick case according to claim 11, wherein the third hook is convex toward the interior of the third case.
 13. The lipstick case according to claim 1, wherein the first body comprises: a first pillar having a hollow portion open on both ends thereof; a partition plate located in the hollow portion of the first pillar, and the first pillar is divided into upper and lower portions with respect to the partition plate, the upper portion of the first pillar and the partition plate being adapted to accommodate the lipstick therein.
 14. The lipstick case according to claim 13, wherein the first coupling portion and the second coupling portion are located on the lower portion of the first pillar. 